Metal-working machine



J. T. HOLTFOTH METAL WORKING MACHINE Filed 001,. 21 1922 3 Sheets-Sheet l 5 mm NMI/ M WJ m m l w M T w m w m w a 0 d m Nov 18- 1924;

'J. T. HOLTFOTH PCLTAL WORKING MACHINE Filed Oct.

21, 1922 s Sheets-Shet 2 hl 'm r. Ho/ffofh Joac J. T. HOLTFOTH METAL WORKING MACHINE Filed Oct; 21, 1922 I s Sheets-Sheet s Joachim T Hoff "0171 I N VEN TOR.

TTORNEY.$

Patented I8, lfi i.

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JOAGHIM T. HOLTFOTII, OI? IIIGI-ILAIID PARK, hitICIIIG-AN, .ASSIGIJOB, TO L. YOUNG INDUSTRIES, INC., 0.? DETROIT, I HIICIIIGAN.

METAL-VTORKING MACHINE.

Appllication filed ()ctcber e1, 1922.

To all whom it may concern:

Be it known that I, JOACHIBI T. IIOLT- route, a citizen of the United States, residing at Highland Park, county of Wayne, State I; of Michigan, have invented certain. new and useful Improvements in Metal-Working Machines, of which the following is a specification.

This invention relates to improvements in metal working machines.

I have illustrated my improvements in the accompanying drawing as I have embodied them in a machine for conforming the ends of iii-shaped sheet metal strips or 5 members employed in border frames of spring cushion structures, such as illustrated in my Patent No. 1,439,891, dated December 26, 1922, in which the border rim is made up of two similarly shaped sections joined by telescoping the ends thereof, one channel of the iishaped frame bein contracted to fit within the corresponding channel of the coacting telescoping end part. My inrorore ments are, however, desirabie and readily 5 adapted for other shapes, or the contracting or expanding of the ends of sheet metal strips of other cross sections.

The main objects of the invention are:

First, to provide a machine for operating upon the ends of strips of s cross section for contracting or expanding parts thereof.

Second, to provide an improved machine of the class described which is effective for the purpose and does not deform or distort parts of the strip other than the parts acted upon.

Third, to provide a machine of the class described which is of very large capacity.

Fourth, to provide an improved machine of the class described which is simple in structure, easy to operate, and not likely to get out of repair.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow. I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming a part of this application, in which:

Figure I is a front perspective of a metal ficrial No. 595,980.

Working machine embodying the features of my invention, a portion of the driving pulley being broken away for convenience in illustration.

Fig. II is a fragmentary front perspective of the right hand end of the machine.

F III is a fragmentary front elevation, the die member and its guide being partially sectioned.

Fig. IV is a transverse section on a line corresponding to line iof Fig. III.

Fig. V is a transverse section on a line corresponding to line 5-5 of Fig. III, the frame being omitted.

Fig. VI is a detail longitudinal section on a line corresponding to line 66 of Fig. II through the die members, the same being shown in actuated position and in relation to a piece of work.

Fig. .VI I is a sectional view on a line corresponding to line 7-Z' of Fig. VI sl'iowing the form of'the die and the relation of the work thereto.

Fig. VII is a detail longitudinal section on a line corresponding to line 7 7 of Fig. VII.

Fig. VIII is a sectional View on a line corresponding to line 8-8 of Fig. VI illus trating the form of die.

Fig. VIII is a detail section on a line corresponding to line 8 8 of Fig. VIII.

Figs. IX and XI are fragmentary side elevations of the ends of the work prior to the machine operating thereon.

Figs. X and XII are fragmentary elevations of the ends of the work after it has been operated upon.

Figs. XIII and XIV are end elevations of the Work on line 1313 of F X and line 1 l14i of Fig. XII, respectively.

In the drawing similar reference numerals refer to similar parts throughout the several views and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, in the cmbodiment illustrated I provide a frame comprising pedestals 1, there being three pedestals illustrated, and the longitudinal frame members 2, 8, 4 and 5. 0n the frame inembers 2 and 3 at the top of the pedestals I mount bed members (3 for adjustment towards and from each other. The operating parts being carried on these bed members, the adjustment of the bed members acconr modates work of different lengths. its stated, the particular machine illustrated is devsigned to operate on the work 7 of i3 cross section, shown in Figs. Di and K1, the he being parts of cushion border frames such as illustrated in my said patent. The particular purpose of the machine is to contract one fiange at S and the opposite flange at 9.

:To support the work in the machine 1 provide rests 10, the faces of the rests being conformed at 11 to the shape of the work. Clamping jaws 12 are pivoted at 13 on the rests and have faces 14: which are complementary to the faces of the rests so that the work is embraced on both sides.

At the rear of the machine is a driving shaft 15 provided with a cam 16 acting ipon a plunger 17 which is connec" l by the 1 8 to theclamps,see Fig. Tv.

These links have springs 19 therein of such strength as to exert a yielding clamping action upon the work, thereby accommodating variations in the gage of the work and avoiding the necessity of great accuracy in the parts. The spring 20 normally holds the jaw in retracted position. The shaft 15 is driven from the pulley 2l throu'gh a clutch 22 controlled from the foot lever 23 on the rod 5 which serves as a rock-shaft, the rod having an arm 2% connected by the link 25 to the clutch. The details of the clutch are not shown as they form no part of my invention.

Die members 26 and 2? are mounted in the ways 28 in alignment and reciprocate toward each other. These die members are connected by the pitmen or connecting rods 29 to the crank disks 30 of shafts 81 which have gears 32 thereon meshing with gears 33 on the shaft 15. A positioning stop 34; is carried by the rock-shaft 35 having an arm 36 thereon connected by the link 37 to an arm 38 on the rock-shaft 39. This rock-shaft has an arm 40 disposed to be engaged by the cam 16 as "shown in Fig. IV, the cam acting to retract the stop as the jaw is closed, the jaw remaining closed or in clamping position during the reciprocation of the dies. A rest 4:1 is disposed intermediate the rests 10 to assist the operator in locating the work which is located with one end against the positioning stop. The recesses of tie dies are con-- formed to the reduced or conformed cross section of the work, the die 26 being beveled at 42 While the die 27 is beveled at 43 so that as the dies close upon the work the work is contracted as indicated in Figs. X and XII. The die members operate simultaneously upon opposite sides of the work, the work being supported and gripped so that it is not buckled or deformed except as it is conformed by the dies. The machine illustrated is provided with holders 4A adapted to re ceive a quantity of the strips constituting the work.

The operator standing in front of the machine places the work in the rests 10, the intermediate rest all being provided to assist in the location of the work, one end of the work being positioned against the stop 34;, although it will be understood that the work is not pressed against the stop but merely positioned with the end at the side of the stop, The operator throws in the clutch by means of the foot treadle 23. The operation of the machine being automatic .it is only necessary for the operator to place and remove the work and actuate the machine through the treadle 23. The cams and other connections on the driving shaft are so positioned and arranged that the clamping jaws 12 are actuated to clamp the work in the rest-s, the stop 3% retracted, and then the dies are actuated simultaneously through the connections described, the parts being rct-racted so that the operator may lift the work from the machine.

This machine is of large capacity and the parts are simple in structure and are not likely to get out of repair in use.

I have illustrated and described my improvements in an embodiment which I have found very practical, I have not attempted to illustrate or describe other modifications or adaptations as'l believe the disclosure made will enable. those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described my invention what I claim as new and desire to secure by Lelters Patent is:

1. Tu a machine of the class described, the combination of bed members, a driving shaft, a manually controlled driving clutch for said shaft, work rests on said bed members, coacting pivotally mounted work clamping jaws, springs acting to hold said jaws normally open, means for actuating said jaws comprising cams on said driving shafl, plungers coacting with said cams and links connecting said plungers to said jaws, said links having springs interposed therein, opposed aligned die members reciprocutingly mounted on said bed members to act on the work supported by said rests, and means for sinniltaneously reciprocating said die members.

2. In a machine of the class described, the combination of bed members, a driving shaft, a manually controlled driving clutch for said shaft, work rests on said bed members, coacting pivotally mounted work clamping jaws, means for actuating said jaws comprising cams on said driving shaft. opposed aligned die members reciprocatinglv mounted on said bed members to act on the work supported by said rests, means for simultaneously reciprocating said die men! hers comprising driven shafts mounted on said bed members transversely of said drivlllll ing shaft and geared thereto, said driven shafts having crank disks at the forward ends thereof, connecting rods connecting said die members to said crank disks, a pivotally mounted work positioning stop lying normally in front of said die members, and means for retracting said stop comprising said driving shaft.

In a machine of the class described, the combination of bed members, a driving shaft, a manually controlled driving clutch for said shaft, work rests on said bed members, coacting pivotally mounted work clamping jaws, means for actuating said jaws comprising cams on said driving shaft, opposed aligned die members reciprocatingly mounted on said bed members to act on the work supported by said rests, means for simultaneously reciprocating said die members comprising driven shafts mounted on said bed members transversely of said driving shaft and geared thereto, said driven shafts having crank disks at the forward ends thereof, and connecting rods connecting said die members to said crank disks.

4. In a machine of the class described, the combination of bed members, a driving shaft, a manually controlled driving clutch for said shaft, work rests on said bed members, coacting work clamping jaws, means for actuating said jaws comprising cams on said driving shaft, opposed aligned die mem bers reciprocatingly mounted on said bed members to act on the work supported by said rests, means for simultaneously reciprocating said die members driven by said shaft, a pivotally mounted work positioning stop lying normally in front of one of said die members, means for retracting said stop comprising one of said cams on said driving shaft, a rock-shaft disposed parallel to said driving shaft and having an arm thereon coacting with such cam, a return spring for said rock-shaft, and a link connecting said stop to an arm on said rockshaft, said cams being adapted to hold the clamps in closed position during the work stroke of the dies and to withdraw the stop from the path of the die with which it is associated.

5. In a machine of the class described, the combination of work rests conformed to work of S cross section, coacting complementary work clamping jaws, aligned die members mounted for longitudinal reciprocating movement to simultaneously act on the ends of the work supported by said res s, said die members being recessed to receive the ends of the work, one recess being conformed at its outer end to contract one flange of the work whereby the ends are adapted for telescoping engagement with a duplicate member, means for simultaneously actuating said die members, a work positioning stop normally lying in front of one of said die members, and means for actuating said jaws and retracting said stop timed so that the jaws are held in closed position during the work stroke of the dies and the stop is withdrawn from the part of the die with which it is associated.

6. In a machine of the class described, thev combination of work rests conformed to work of 8 cross section, coacting complementary work clamping jaws, aligned d e members mounted for longitudinal reciprocating movement to simultaneously act on the ends of the work supported by said rests, said die members being recessed to receive the ends of the work, one recess being conformed at its outer end to contract one flange of the work and the other being adapted to contract the other flange of the work whereby the ends are adapted for telescoping engagement with a duplicate member, means for simultaneously actuating said die members, and means for actuating said jaws timed so that the jaws are held in closed position during the work stroke of the dies.

7. In a machine of the class described, the combination of work rests conformed to the work, coacting work clamping j aws, aligned die members having longitudinal conforming recesses mounted for longitudinal reciprocating movement to simultaneously act on opposite ends of the work supported by said rests, means for sin'mltaneously actuating said die members, a work positioning stop normally lying in front of one of said die members, and means for actuating said jaws and retracting said stop timed so that the jaws are held in closed position during the work stroke of the dies and the stop is withdrawn from the path of the die with which it is associated.

8. In a machine of the class described, the combination of work rests conformed to work of S-cross section, coacting work clamping jaws, aligned die members having longitudinal conforming recesses mounted for longitudinal reciprocating movement to simultaneously act on opposite projecting ends of the work supported by said rests and jaws, means for simultaneously actuating said die members, and means for actuating said jaws timed so that the jaws are held in closed position during the work stroke of the dies.

9. In a machine of the class described, the combination of a work rest conformed to work of 8 cross section, a coacting complementary work clamping jaw, means for actuating said jaw to clamping engagement with the work in said rest, a die member mounted for longitudinal reciprocating movement to act on the end of the work supported by said rest, said die member being recessed to receive the end of the work, the

ill

recess being beveled at its outer end to contrav ne flange oft-he'work, means for actii'aitiri Said die member, a work "positioning stop norniallylying in front of said dieinember, and means for actuating said jaw?and'iretracting dstop timed so that the jaw is held inclosed position during the workstroke oi the "die and the stop is with-clams from the path oi' the die with whiohdt 1; asso ciated. i

10; In a machine of the class described, the combination o fa work rest confo'rined towork of s crose section; a coacting" complementary work clamping" aw; means for actu ating said aw to clamping engagement with the work in said rest, a die member mounted -tor longitudinal reciprocating movement to act onf tlie :end of the work supported by said rest said "die member being recessed to rev ff 'e end of the work. meansitor actuating-said die member, and means for actuatingsaidjaw timed so thatt'he jaw is held in closed'position' during the work stroke ofthe fdiel '1'1.-'In a machine of the class described, the combination of a work rest conformed to work of S-cross section, a coacting' complementary work clamping jaw, said jaw and 'rest being adapt'ed'to support thework with resend projecting therefrom, and a die member" mounted for longitudinal reciprocating movement relative to the Workto act on the projecting end or thework while supported by said restand jaw, said die member being recessed to receive the end of the work, the

recess being beveledat its outer end to contract 'one flange of the work.

12.111 a niachine" o'f'the class described, the combination of work holders conformed to work of S-cross section disposed in spaced relation to' support the work adjacei'it its ends and with its ends projecting at the outside ofthe holders. aligned die'inembers mounted for longitudinal reciproeatin; movement to simultaneously act upon'the projecting'ends of the work supported by said rests, said 'die members being recessed to receive the ends ot'the work. one recess beingconformed at its outer end to contract one'flange oi the work whereby the ends are adapted for telescoping engagement with said rests, and means for simultaneously actuating said die members.

it. In a machine of the class described, the combination oi work supporting means adapted to support workof S-cross section with the end of the work projecting therefrom, and a die member mounted for reciprocating movement longitudinally of the work toact on the projecting end thereof, said the member being recessed to receive the end of the work the recess being beveled at its outer end to contract one flange ot the work.

In witness whereof, I have hereunto set my hand and seal.

M JOACI-Hlvl T. HOLTFOTIH. [1 sf} 

